ARRI Rosettes & Pins vs. NATO Rail
Comparing 2 standards across 12 specifications. 12 key differences identified.
The ARRI Rosette (31.8 mm diameter with 60 radial teeth and an M6 central thread) and ARRI 3/8"-16 Anti-Twist Locating Pins (dual 3.0 mm indexing holes flanking a 3/8"-16 screw) are the de facto cinema rigging standards developed by Arnold & Richter Cine Technik (ARRI) to prevent camera cage accessories from twisting under heavy rotational torque.
The NATO Rail (adapted from military STANAG 4694 / Picatinny rail profiles into cinema camera rigging by SmallRig, Tilta, Wooden Camera, and RED) is a 21.2 mm wide aluminum accessory rail with chamfered lips and spring-loaded safety pins. It provides instant, tool-less quick-release mounting for camera top handles, field monitor mounts, and side handgrips.
Specification Comparison Table
12 Parameters| Parameter / Spec | ||
|---|---|---|
|
ARRI Rosette Outer Diameter
|
31.8 mm (1.25 in) | — |
|
Tooth Configuration
|
60 radial interlocking teeth (enables precise 6.0° rotational index adjustments) | — |
|
Rosette Center Bolt
|
M6 × 1.0 mm internal metric thread (or 1/4"-20 on some consumer cages) | — |
|
ARRI 3/8"-16 Anti-Twist Pattern
|
Central 3/8"-16 screw flanked by two 3.0 mm locating pin holes at 15.0 mm spacing | — |
|
Primary Applications
|
Cinema handgrips (ARRI Alexa, RED, Sony Venice, FX9), extension arms, heavy top handles, monitor arms | — |
|
Torque Resistance
|
Highly resistant to rotational slippage when properly seated, since the teeth physically mesh together rather than relying on friction alone | — |
|
Rail Width (Top Flange)
|
— | 21.2 ± 0.2 mm (0.835 in) |
|
Bevel Profile
|
— | Tapered clamp lip on both edges with center alignment groove |
|
Safety Pin Mechanism
|
— | Spring-loaded ball bearing / safety pin at each end prevents handle from slipping off rail if clamp loosens |
|
Mounting Options
|
— | Machined directly into top/sides of camera cages or bolted via dual 1/4"-20 screws |
|
Clamp Torque System
|
— | Tool-less thumbscrew or ratchet locking wing lever |
|
Rigging Brands
|
— | SmallRig, Tilta, Wooden Camera, Kondor Blue, SHAPE, Vocas, RED Digital Cinema |